Steam-boiler



(No Model.) 2 Sheets-Sheet 1.

J. w. PUTNAM. STEAM BOILER.

Patehted Dec. 6, 1892.

r 0 W m WW a m W (No Model.) 2 SheetsSheet 2. J. W. PUTNAM. STEAM BOILER.

Patented Dec. 6, 1892.

mmddfi UNITED STATES PATENT FFICE.

JOSEPH W. PUTNAM, OF NEW ORLEANS, LOUISIANA.

STEAM-BOILER.

SPEGIFICATION forming part of Letters Patent No. 487,641, dated December 6, 1892.

Application filed March 7, 1892.

To all whom it may concern:

Be it known that I, JOSEPH W. PUTNAM, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention relates to that type of vertical steam-boilers comprising inner and outer shells and lines which discharge the products of combustion into the steam -space, from whence they are conducted with the live steam to the engine.

The object of my invention is to provide a novel, simple, eflicient, and economical vertical steam-boiler of such construction that the products of combustion are caused to flow through lines which traverse the Water-space between the inner and outer boiler-shells and discharge into the steam-space without danger of fioodin g the fire-box by the water foaming or boiling over or passing into such fines.

The invention also has for its object to provide novel means whereby ashes, cinders, and like heavy matter are deposited by the fines into a receptacle distinct from the water chamber or space of the boiler, and the remaining light products of combustion are discharged into the steam-space and flow with the live steam to the cylinder or cylinders of the engine.

The invention consists, essentially, in the combination, with a vertical steam -boiler comprising outer and inner shells to form an intervening water-space, of a flue connected with the top portion of the inner shell, running downward through the water-space and thence rising therethrough into the steamspace above the water-level for the purpose of discharging the prodnctsof combustion into the steam-space, from whence they flow with the live steam to the cylinder or cylinders of the engine.

The invention also consists in the combination, with a vertical steam-boiler comprising inner and outer shells to form an intervening water-space, of a flue connected with the top portion of the inner shell, running downward through the water-space and thence rising therethrough into the steam-space above the water-level, where such fine is provided with a goose-neck or bent end terminating in an Serial No. 424,050- (No model.)

ash or cinder receptacle having connection with the steam-space of the boiler in such manner that the ashes, cinders, and like heavy matter are deposited in the receptacle, while the remaining light products of combustion are discharged into the steam-space and flow with the live steam to the cylinder or cylinders of the engine.

The invention is illustrated by the accompanying drawings, in which- Figure 1 is avertical central sectional view of a steam-boiler constructed in accordance with myinvention. Fig. 2 is a detailsectional view showing a modification of my invention.

In order to enable those skilled in the art to make and use myinvention, I will now describe the same in detail, referring to the drawings, wherein The numeral 1 indicates the outer shell and the numeral 2 the inner shell, supported from the outer shell by a ring and rivets or bolts 3 to provide an intervening annular water-space 4. The inner shell is provided with a top wall 5 and constitutes the fire-box and combustionchamber of the boiler. If coal or similar fuel is employed to generate heat, a fire-grate 6 is arranged in the lower portion of the i nner shell, and a feed-chute 7 extends from the latter for supplying the coal or similar fuel. The grate is preferably supported at its center by an arm 8, rigidly secured to a horizontal shaft 9, supported by the pendent portions of the inner shell and extending at one end through the outer shell, so that the shaft can be rocked through the medium of a crank or other handle 10 for the purpose of shaking the grate. I do not, however, confine myself to the employment of a grate and a fuel-feeding chute, as obviously the heat may be generated by the employment of a combustible fluid supplied to a burner in the usual manner.

To the top wall of the inner shell is connected a series of fines 12, which run downward through the Water-space of the boiler to a point in juxtaposition to the base thereof and then rise through the Water-space into the steam-space 13 above the water-level,

Where the upper end portions of the lines are each drawn into a goose-neck or bent portion 14 for the purpose of discharging the products of combustion into the steam-space, so that such products of combustion flow with the live steam through the steam-supply pipe 15 to the cylinder or cylinders of the engine.

By causing the flues to traverse the waterspace of the boiler in a tortuous pathway, as shown, the full heating capacity of the products of combustion is utilized for heating the water, and, furthermore, it is impossible for the water to foam or boil over into the fines and flood the fire-box or fire, which will occur where the fines run straight upward from the top of the inner shell and terminate slightly above the water-level. The construction of each flue with a goose-neck or boot portion 14 at its upper end also materially aids in preventing the passage of water into the flues. In this construction the products of combustion are discharged upon the surface of the water and flow with the live steam to the cylinder or cylinders of the engine. The arrangement illustrated by Fig. l is more particularly useful where the heat is generated byaburner supplied with acombustible fluid; but if coal or wood fuel is employed the discharge of the ashes and cinders into the water may be objectionable under certain circumstances, and therefore in the use ofcoal or wood as the fuel I prefer to extend the goose-neck or bent portion 16 of the fines 12 into an ash or cinder receptacle 17, having communication with the steamspace of the boiler. This receptacle may be constructed and arranged in any manner-snitable for the conditions required; but I prefer to construct it of an elbow-shaped tube 17, closed at its lower end and connected at its upper end with the steam-space of the boiler. The goose-neck or bent portion 16 of each flue 12 terminates in the receptacle above the bottom thereof, so that the ashes, cinders, and like heavy matter are deposited into the receptacle, while the remaining light products of combustion are discharged into the steamspace and flow with the live steam to the cylinder or cylinders of the engine.

To promote combustion and create the requisite draft, I supply air-supply pipes 18 and 19, which discharge air below and above the fireplace. The pipes are intended to connect with two air-forcing pumps, so that the forced air subserves the purpose of forcing the products of combustion through the tortuous fines.

In practice the ash or cinder receptacle 17 will be supplied with a small quantity of water to retain the ashes or cinders deposited by the fines.

In my invention the construction is novel, simple, and economical, and the products of combustion are caused to traverse a tortuous pathway through the water-space to utilize their full heating capacity, while it is impossible to flood the fire-box by the water foaming or boiling over into the fines. The boiler may be provided with a suitable door, as at 20, and the lower end of the outer shell may be provided with a blow-off cook 21 for blowing out ashes falling from the grate.

What I claim is 1. The combination, with a vertical steamboiler comprising outer and inner shells to form an intervening water-space; of a flue connected with the top portion of the inner shell, running downward through the waterspace and thence rising therethrongh into the steam-space above the water-level for the purpose of discharging the products of combustion into the steam-space, from whence they flow with the live steam to the cylinder or cylinders of the engine, substantially as described.

2. The combination, with a vertical steamboiler comprising inner and outer shells to form an intervening water-space, of a fine connected with the top portion of the inner shell, running downward through the waterspace and thence rising therethrongh into the steam-space above the Water-level, where such flue is provided with a goose-neck or bent end terminating in an ash or cinder receptacle having connection with the steam-space of the boiler in such manner that the ashes, cinders, and like heavy matter are deposited in the receptacle, while the remaining light products of combustion are discharged into the steam-space and flow with the live steam to the cylinder or cylinders of the engine, substantially as described.

In testimony whereof I have hereunto set my hand and aflixed my seal in presence of two subscribing witnesses.

J. W. PUTN AM. [L. 3.] Witnesses:

ALBERT H. NORRIS, JAMES A. RUTHERFORD. 

